@book{112920,
	author = {Liegel, Leon Herman},
	title = {Seasonal nutrition of 3- and 4- year old Pinus caribaea foxtails and normal -branched trees in Puerto Rico},
	publisher = {North Carolina State University},
	year = {1981.},
	address = {Raleigh, N.C.},
	note = {Typescript (photocopy) Ann Arborr,Mich., University Microfilm International.}
}